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80 个结果
  • 简介:Thinfilmsofpolymerblendscomposedofalternatingcopolymer,diblockcopolymerand/orhomopolymerarestudiedusingMonteCarlosimulation.Amultilayermorphologyisobservedinthefilm,thatis,theblendedpolymersassembleintoindividualdomainsarrangedfrominteriortothesurfacesofthefilm.Thecoexistingcomponentsresidingthroughouttheneighboringdomainsinthefilmmakenodistinguishableinterfacebetweenanyneighboringdomains.Bythismeans,itformsaverticalcompositiongradientinthepolymericfilm.Beingdifferentfromlayer-by-layerdepositionofpolyelectrolyteorhydrogenbondingapproachetc.,thelayeredstructureinthisstudyisformedbypolymerblendinginonestep.Alternatingcopolymersarefoundtobeessentialcomponentstoformverticalcompositiongradient(layeredstructure)inthinfilms.

  • 标签: 聚合物薄膜 蒙地卡罗模拟 交替共聚物 蒙特卡洛仿真 成分梯度 层状结构
  • 简介:在这篇论文,锥模型在分层的土壤上被用于二个基础的颤动分析半空间。在分析,在心土的全部的应力场被划分成免费地并且散布的地。种子“s简化了方法为thefree地分析被采用,当锥模型为分析被建议时,动态散布压力波浪回答。在散布采购的有二的分层的阶层的shear应力场和压缩应力场被计算由砍锥和压缩的锥分别地。而且,在有二个基础的心土的应力场被划分成六个地区,并且P波浪和Swave在每个地区被分析。数字结果被提供在垂直、水平的正弦曲线力量刺激下面为二个表面基础说明增加的应力场的特征。建议的锥模型可能在处理一些联系散布withmulti采购的复杂问题是有用的。

  • 标签: 分层地基 地基-建筑物相互作用 应力波 基础振动 锥形模型
  • 简介:Thespudcanfoundationhasbeenwidelyusedinoffshoreengineeringforjack-uprigs.However,'punchthrough'failureoftenoccurswhereastrongersoillayeroverlaysasoftersoillayer.Inthisstudy,spudcanpenetrationintodoublelayeredsoilsisinvestigatednumerically.Thesoilprofileissetupasastrongersoillayeroverlayingasoftersoillayer,withthesoilstrengthratio(bottomsoilstrength/topsoilstrength)variedfrom0.1to1.0(1meansuniformsoil).Thebearingbehaviourisdiscussedandthebearingcapacityfactorsaregivenforvariouscasesinvolvingdifferentlayerthicknessesanddifferentstrengthratiosofthetwoclaylayers.Thedevelopmentoftheplasticzonesandtheeffectofsoilselfweightonthebearingcapacityarealsodiscussed.Fromthisstudy,itisfoundthat,whenaspudcanisdistantfromthesoillayerboundary,thespudcancanbeanalysedwithsinglesoillayerdata.However,whenaspudcanbecomesclosertothesoilboundarylayer,theinfluenceofthelowersoftsoillayerissignificant,andthebearingcapacityofthespudcandecreases.Thecriticaldistanceisanindicationoftheoccurrenceof'punchthrough'failure.Thecriticaldistancebetweenthespudcanandthelayerboundaryislargerforaroughspudcanthantheoneforasmoothone,andthecriticaldistancedecreaseswithincreasingsoilstrengthratio.Thedepthofcavityformedduringinitialspudcanpenetrationdependsonthetoplayersoilstrength,soilstrengthratioandunitsoilself-weight,andthecavityaffectsthespudcanbearingbehaviouraswell.

  • 标签: 深度渗透 双层土壤 海上工程 临界距离 连续分布
  • 简介:ThispapergivesanoverallintroductiontothebasicconceptofLAC(location-awarecomputing)anditsdevelopmentstatus,putsforwardanintegratedlocation-awarecomputingarchitecturewhichisusefulfordesigningthereasonablelogicalmodelofLBS(location-basedservice).Finally,abriefintroductionisconductedonaLACexperimentalprototype,whichactsasamobileurbantourismassistant.

  • 标签: 空间信息服务 地理信息系统 局部计算 分层结构 逻辑模型
  • 简介:阴极材料李[CoxNiyMn1?x?y]为锂的O2第二等的电池被一条新线路作为一位先锋用分层的双氢氧化物(LDH)准备了。结果有-NaFeO2结构的分层的阶段在菱形的系统结晶,与有到0.47nm的夹层间距结束的空格组R-3m。X光检查光电子光谱学(XPS)被用来测量公司,Ni和Mn的氧化状态。在结构和李的电气化学的性质上改变Co/Ni/Mn比率的效果[CoxNiyMn1?x?y]O2被X光检查衍射和电气化学的测试调查了。产品表明了相当稳定的骑车行为,与为有Co/Ni/Mn=1/1/1的分层的材料的118mAh/g的一个可逆能力。

  • 标签: 层状正极材料 层状双金属氢氧化物 层状前体 O2 X射线光电子能谱 合成
  • 简介:在这份报纸,为multiferroic的三维的有限元素的明确的表达合成为它的短暂分析被开发并且实现进商业软件ABAQUS。首先,一个特殊三维的八节点的稳固的元素被设计处理用橡皮做的合成的multiferroic,压电,并且piezomagnetic材料。第二,为这个最新发达的元素的一个自定义子程序被实现进ABAQUS。最后,双性人分层的multiferroic的短暂回答合成被使用直接时间集成方法计算。二个典型磁性的潜在的信号,高斯和Ricker脉搏,被用于与刺激的各种各样的时间持续时间合成。短暂反应能被输入实质地影响的导致的电场表演发信号,它能为最强壮的电的输出被调节。

  • 标签: 瞬态响应 复合板 ABAQUS 三维有限元 复合材料
  • 简介:Near-fleldcoupledplasmonicsystemsgenerallyachieveplasmonicallyinducedtransparency(PIT)usingonlyone-waybright-darkmodecoupling.However,itischallengingtorealizesuchwell-designeddevices,mainlybecausetheydependsignificantlyonthepolarizationdirection.Weexploitsurfaceplasmonssup-portedbytwocrossedlayersofgraphenenanoribbons(GNRs)toachievedynamicallytunablePIT,whereeachGNRoperatesasboththebrightanddarkmodessimultaneously.TheproposedPITcanresultfromeitherone-waybright-darkmodeinteractionsorbidirectionalbright-brightandbright-darkmodehybrid-izedcouplingwhenthepolarizationisperpendicular/paralleloratanangletotheGNRs,respectively.Additionally,identicalribbonwidthsyieldpolarization-insensitivesingle-windowPIT,whereasdifferentribbonwidthsproducepolarization-dependentdouble-windowPIT.Weexaminetheproposedtechniqueusingplasmonwavefunctionsandthetransfermatrixmethod;analyticalandnumericalresultsshowex-cellentagreement.ThisstudycanprovidephysicalinsightintothePITcouplingmechanismsandadvancetheanulicabilitvandversatilityofPIT-basedsensingplatformsandotheractivedevices.

  • 标签: 近场耦合 等离子体系统 通讯技术 发展现状
  • 简介:在隧道流动由二层组成由底部波动散布飞机表面波浪被假设隧道的床由多孔的材料组成调查。液体的上面的表面被一个僵硬的盖围住,隧道在水平方向是无界的。在那里存在相应于一个内部波浪的一个仅仅波浪模式。为小波动,简化不安分析被用来首先以包含描述底部的形状功能的积分获得顺序思考和传播系数。为正弦曲线底部波动和指数地腐烂的底部地形学,第一命令系数被计算。在正弦曲线底部的情况中,第一个顺序传播系数被发现相等消失。数字结果在很多个数字图形地被描绘。

  • 标签: 多孔材料 底部 起伏 散射 通道 透射系数
  • 简介:DynamicbehaviorofsinglepileembeddedintransverselyisotropiclayeredmediaisinvestigatedusingthefiniteelementmethodcombinedwithdynamicstiffnessmatricesofthesoilderivedfromGreen’sfunctionforringloads.Theinfluenceofsoilanisotropyonthedynamicbehaviorofpilesisexaminedthroughaseriesofparametricstudies.

  • 标签: PILE-SOIL system soil ANISOTROPY transversely ISOTROPIC
  • 简介:Thedispersioncharacteristicsandexcitationmechanismsoftheguidedwavesinmultilayeredplatesarestudiedinthispaper.Firstly,thedispersionequationisobtainedbythepropagatormatrixmethod.Then,thebisectiontechniqueisemployedtofindalltherootsofthedispersionequation.Thedispersioncharacteristicsoftheguidedwavesareinvestigatedandanalyzed.ForthemultilayeredplatesinwhichtheS-wavevelocityincreasesordecreasesfromtoptobottom,itisfoundthatthevelocitylimitsinhighfrequencyofthefirstandhighmodesareequaltotheRayleighwaveandS-wavevelocitiesofthelow-velocitylayer,respectively.ItisalsofoundthatthevelocitylimitsinthehighfrequencyofallmodesareequaltotheS-wavevelocityofthelow-velocitylayerfortheplatewithalow-velocitymiddlelayer.Thenormaldisplacementspectrumofallthemodesexcitedbythenormalforcesourcewithadefinitewidthonthesurfaceoftheplateisalsoinvestigated.ItisprovedthatthedominantmodeisthefirstmodewhentheS-wavevelocityincreasesfromtoptobottomlayerandthedominantmodeisdifferentindifferentfrequencyrangefortheplatewithalow-velocitymiddlelayer.

  • 标签: 传播矩阵法 平板 导波 横波速度 色散特性 色散方程
  • 简介:这份报纸报导为分层的alpha锆磷酸盐(伪-ZrP)的准备的一条新线路支持了metalloporphyrinMnTMPyP。MnTMPyP用伪-ZrP路BA被设置进伪-ZrP(即预先设置的bultylamine被一个单层模式在伪-ZrP安排)作为开始的材料。为homovanillic酸(HVA)的支持的材料的催化活动氧化被调查。结果在催化系统显示出有希望的分层的支持材料的催化剂。

  • 标签: MnTMPyP 层状α-ZrP 催化反应 材料夹层
  • 简介:Inthiswork,dynamiccompositeanalysistruncatedsandwichconicalshells(STCS)withdifferentboundaryconditionsunderlowvelocityimpactwasinvestigatedanalytically,accordinghigherordersandwichpaneltheory.ImpactoccurredatthetopfacesheetandthecontactforcehistoryispredictedusingtwosolutionmodelscalculatedapplyingprincipalofHamiltonbyconsideringthedisplacementcontinuityconditionsbetweenthelayers.Forobtainingthedisplacementandcontactforcehistories,thedifferentialquadraturemethod(DQM)isutilised.Inthisinvestigation,theeffectsoflayerlaminanumber,conesemivertexangle,boundaryconditionsandimpactvelocityontheimpactresponsearestudied.

  • 标签: dynamic BUCKLING single walled CARBON nanotubes(SWCNTs)
  • 简介:线性链烷的混合物的吸附等温线,包含n戊烷,n己,;在pillared的n-heptane有三不同的孔Ω=的分层的材料(PLM)0.98,0.94;0.87,;三毛孔宽度H=1.02,1.70;在温度T=300K的2.38nm被使用configurational偏爱蒙特卡罗(CBMC)模仿在宏大正规整体的技术。一个格子模特儿被雇用计算在一个液体分子之间的相互作用;这里的二块分层的板。为链烷混合物,n-heptane,在链烷混合物的最长的链部件,优先地在低压力被吸附,与它增加的吸附;当时,然后作为压力减少连续地增加n戊烷,在链烷混合物的最短的链部件,仍然在高压力被吸附;链烷混合物的最长的链部件的吸附作为毛孔宽度增加;PLM增加的孔。

  • 标签: 石化工业 吸附行为 烷烃 低温条件
  • 简介:Layereddoublehydroxides(LDHs)areaclassoflayeredinorganicmaterialsthatconsistofstructurallypositivelychargedlayersandexchange-ableanionsintheinterlayergalleryforchargebal-ance.ThedelaminationofLDHsisdecidedbysyn-thesismethodtosomeextent.Inthiswork,LDHsaresynthesizedviathreedifferentroutesandtheirdelaminationpropertiesarecharacterized.Co-precipitationmethodion-exchangemeth-

  • 标签: 英语 阅读 理解 复合材料
  • 简介:Inthiswork,dynamiccompositeanalysistruncatedsandwichconicalshells(STCS)withdifferentboundaryconditionsunderlowvelocityimpactwasinvestigatedanalytically,accordinghigherordersandwichpaneltheory.ImpactoccurredatthetopfacesheetandthecontactforcehistoryispredictedusingtwosolutionmodelscalculatedapplyingprincipalofHamiltonbyconsideringthedisplacementcontinuityconditionsbetweenthelayers.Forobtainingthedisplacementandcontactforcehistories,thedifferentialquadraturemethod(DQM)isutilised.Inthisinvestigation,theeffectsoflayerlaminanumber,conesemivertexangle,boundaryconditionsandimpactvelocityontheimpactresponsearestudied.

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